Thiadiazolyl-azo-indole compounds

ABSTRACT

AZO COMPOUNDS HAVING THE GENERAL FORMULA   1-R2,2-R1,3-(T-N=N-),R3-INDOLE   IN WHICH T IS A DISPERSE DYE 1,3,4-THIADIAZOL-2-YL OR 1,3,5THIADIAZOL-2-YL DIAZO COMPONENT; R1 IS ARYL; R2 IS HYDROGEN, ALKYL, CYANOALKYL, UNSUBSTITUTED OR SUBSTITUTED CARBAMOYLALKYL OR ACYLAMIDOALKYL; AND R3 IS HYDROGEN ALKL, ALKOXY OR HALOGEN. THE COMPOUNDS ARE USEFUL FOR DYEING CELLULOSE ACETATE, POLYESTER AND, ESPECIALLY. POLYAMIDE FIBERS ON WHICH THE COMPOUNDS PRODUCE YELLOW TO ORANGE SHADES AND EXHIBIT GOOD DYEABILITY AND FASTNESS TO LIGHT AND WASHING.

United States Patent M 3,829,411 THIADIAZOLYL-AZO-INDOLE COMPOUNDS Clarence A. Coates, Jr., and Max A. Weaver, Kingsport,

Tenn., assignors to Eastman Kodak Company, Rochester, N.Y. No Drawing. Filed Mar. 29, 1972, Ser. No. 239,338 Int. Cl. C09b 29/36; D06p 3/24, 3/52 US. Cl. 260-158 10 Claims ABSTRACT OF THE DISCLOSURE Azo compounds having the general formula in which T is a disperse dye 1,3,4-thiadiazol-2-yl or. 1,3,5- thiadiazol-Z-yl diazo component; R is aryl; R is hydrogen, alkyl, cyanoalkyl, unsubstituted or substituted carbamoylalkyl or aeylamidoalkyl; and R is hydrogen, alkyl, alkoxy or halogen. The compounds are useful for dyeing cellulose acetate, polyester and, especially, polyamide fibers on which the compounds produce yellow to orange shades and exhibit good dyeability and fastness to light and washing.

This invention concerns novel thiadiazolyl-azo-indole compounds and certain synthetic fibers dyed therewith.

Our novel azo compounds have the general formula wherein T is a disperse dye 1,3,4-thiadiazol-2-yl or 1,3,5 thiadiazol-2-yl diazo component;

R is aryl;

R is hydrogen, lower alkyl, cyanoethyl, lower alkylsulfonamidopropyl, arylsulfonamidopropyl,

-(CH ---CONR-"R CH CH CH NHCOR or a group having the formula in which n is 2 or 3; R individually is hydrogen, lower alkyl, cyclohexyl, aryl, hydroxymethyl, benzyl or 1,1- dimethyl-3-oxobuty1; R individually is hydrogen or, when R is hydrogen or lower alkyl, R also can be lower alkyl; R and R collectively are pentamethylene or ethyleneoxyethylene; R is hydrogen; lower alkyl; lower alkyl substituted hydroxy, lower alkoxy, lower alkylthio, lower alkanoyloxy, cyano, carbamoyl, aryl, halogen, aryloxy or lower alkylsulfonyl; cyclohexyl; lower alkylcyclohexyl; lower alkoxy; furyl; allyl; or aryl; R is ethylene, trimethylene, 1,2-propylene, ophenylene, or o-phenylene substituted with lower alkyl, lower alkoxy or halogen; X is CO, -CH or SO and in which each aryl group is phenyl or phenyl substituted with lower alkyl, lower alkoxy or halogen; and

R is hydrogen, lower alkyl, lower alkoxy or halogen.

Patented Aug. 13, 1974 The novel compounds produce bright yellow to'orange shades when applied to synthetic fibers such as those spun from cellulose acetate, polyester and, especially polyamide materials according to conventional disperse dyeing procedures. Our novel compound in general exhibits good to excellent dyeability and fastness to light and washing. The polyamide and polyester fibers which can be dyed with the novel azo compounds can be either textile or carpet fibers.

The thiadiazolyl diazo components represented by T are well-known to those skilled in the art as is exemplified by the many patents, such as US. Pats. 3,096,320, 3,221,- 006, 3,418,310 and 3,493,556 and French Pats. 1,503,249, 2,019,449, 2,028,396 and 2,049,189, which disclose azo compounds containing such diazo components. Since the radicals represented by T are disperse dye diazo components, they are free of water-solubilizing groups or groups capable of rendering the azo compounds water soluble such as sulfo and carboxyl groups.

Examples of the substituents which can be present on the S-carbon atoms of the 1,3,4-thiadiazol-2-yl diazo components and/or on the 4-carbon atom of the 1,3,5-thiadiazol-Z-yl diazo components include the following: halogen such as chloro or bromo; cycloalkyl such as cyclohexyl and lower alkylcyclohexyl; aryl; alkylsulfonyl; and groups represented by R" and R in which R is alkyl; substituted alkyl such as alkyl substituted with hydroxy, halogen, alkanoyloxy, alkanoyl, alkoxy, aroyl, alkoxycarbonyl cyano, a group having the formula cycloalkyl, aryl, allyl, aryloxy; alkyl, cycloalkyl; or aryl; and Y is O or S-. The substituents on the 1,3,5- thiadiazol-Z-yl radicals should, in general, be selected from alkyl, alkylsulfonyl, aryl and those having the formula R S. The groups containing an alkyl moiety and which can be present on diazo component T preferably contain up to about four carbon atoms which is designated herein by lower. A preferred group of radicals represented by T have the formula in which 2 is hydrogen, halogen, lower alkylsulfonyl, or a group designated R or R Y in which R is lower alkyl; lower alkyl substituted with hydroxy, halogen, lower alkanoyloxy, lower alkoxycarbonyl, lower alkoxy, cyano, carbamoyl, succinimido, cyclohexyl, lower alkylcyclohexyl, or aryl; cyclohexyl; lower alkylcyclohexyl; or aryl; and Y is O or --S-. The substituents R R described generically hereinabove are well-known and the compounds containing them are obtained by known means from readily-obtainable intermediates.

Preferred coupling components'are those in which R is phenyl, R is hydrogen, lower alkyl, lower alkylsulfonamidopropyl, CH CH CONR R in which R and R each is hydrogen or lower alkyl, or

in which R is lower alkyl, lower alkoxy, cyclohexyl or phenyl, and R is hydrogen.

A group of our novel compounds which, because of their cost: performance ratio, are particularly valuable for dyeing polyamide fibers have the formula wherein Z is lower alkyl, lower alkylthio or lower alkoxy and R is hydrogen, lower alkyl, carbamoylethyl, lower alkanoylaminopropyl, lower alkoxycarbonylaminopropyl Examples 4-13 To 50 ml. of cone. H 50 is added 7.2 g. NaNO por- 1 lower alkylsulfonamldopfopylv o tionwise with stirring. The solution is cooled and 100 ml. The nVe1 e compounds are Prepared y dlazptlzmg of 1:5 acid is added below 20 C. The mixture is cooled an amine having the formula TNH2 and c p g the to about 3 C. and 16.1 g. of 2-amino-5-ethylthio-1,3,4- resulting diazonium salt with an indole having the formula thiadiazole is added below C, f ll d by 1 Q 1:5 acid, all below 5 C. The reaction is stirred at 05 C. for 2 hours. The following couplers (.01 mole) are dis- R H I solved in 40 ml. of 1:5 acid:

\ N-(Z-Carbamoylethyl)-2-phenylmdole (Example 4) T N-(3-Acetamidopropyl)-2-phenylindole (Example 5) Rs N- 3-Ethoxycarbonylaminopropyl) -2-phenylindole according to conventional procedures. The amine diazo (Example 6) precursors can be synthesized by published techniques or P P PY "P Y (EXample 7) techniques analogous thereto. N-(3-Methanesulfonamidopropyl)-2-phenyl1ndole The indole couplers also are synthesized by known pro- (Example 8) cedures using known or readily-obtainable intermediates. N(3chloroacetamldopmpyl)'2'Pheny]1nd1e For example, an N-cyanoalkyl-2-arylindole can be hydroe p lyzed in the presence of sulfuric acid to yield the corp py -P Y responding N-carbamoylethyl compound. The carbamoyl p 1 group can be hydrogenated in the presence of ammonia N(3"Cyclohexylearbonylammopropyl)"2-PhenY11nd01e and a nickel catalyst to yield the aminoalkyl compound p which then is treated with a variety of acylating agents N-(3'Hydroxyaeetamldoleropyl)-2-PhenY11nd01e to yield N-acylaminoalkyl-Z-arylindole couplers. These P and additional techniques are described in detail in the p p Y -P 3 literature. 40 (Example 13) The aZO compounds of lnventlon and P P To each chilled coupler solution is added a .01 mole alitlon and use are further Illustrated by the followmg quot of diazonium solution. The coupling mixtures are p buffered by the addition of ammonium acetate and al- Example 1 lowed to stand for one hour. The azo compound products N-(Z-Cyanoethyl)-2-phenylindole (460 g i h l are precipitated by the addition of water, collected by (200 ml.) is hydrogenated in the presence of Raney filtration; washed with water, dried in air and, if necesnickel (10 g.) and ammonia (25 g.) at 100 C. and 1500 W: P Y S1111TY1ng in e methanol followed y p.s.i. hydrogen pressure until the hydrogen uptake ceases. eoollng, filtermg and Washlng Wlth 601d InethenoL Each The Raney nickel is removed by filtration and the ethanol 0f the ten aZO Compounds OPtamed Produces f h level, is evaporated to yield 42.0 g. of oily product which conorange shades on polyamide fibers and exhibit good sists essentially of N-(3-aminopropyl)2-phenylindole. faStneSS t0 llght- E 1 2 The azo compounds set forth in the following table are Xamp 6 prepared by the procedures described hereinabove and N-(3-Aminopropyl)-2-phenylindole (42.0 g.) is disconform to formula (I) in which 1,3,5-T designates a solved in benzene ml.). Acetic anhydride (18 ml.) 1,3,5-triazol-2-yl residue and 1,3,4-T designates a 1,3,4- is added dropwise, and then the solution is refluxed for o triazol-Z-yl nucleus. Table Examples 413 designate the 2 hours. After cooling, the reaction mixture is drowned formulas of the compounds prepared in preceding Exinto hexane. The product, N-(3-acetamidopropyl)-2- amples 4-13.

TABLE Example number T R R R Color 4-. 5-CzH5S-1,3,4:T -CsH5 OH2CH2CONH2 H Yellow 5 5-CzH5S-1, 3, 4-T C6H5 -(CHz)3NHCOCH3 H D0. 6 5-C2H5S-1, 3, 4-T -CIH5 (CH2)3NHCOOCzH5 H D0. 7..- sc ms-1,341 C@H (CH2)aNHCOCz 5 H Do. s 5-O2H5S-1,3,4-T -C@H5 (CHz)sNHSO2CHa H Do. 9... 5-c,H s-1, 3, 4-T C.H5 (CH;)3NHCOCH;C1 H Do. 10.. 5-CH5S-1,3, 4-1 C H (CH2)aNHCOCHzCH(CHa)a H D0. 11-. 5-CzH5S-1, 3, 4-T -CtH -(CH2)aNHCOCoH1i H D0. 12 5-C2H5S1,3,4T 'CoHs (CH2)3NHCOCH2OH H D0. 13 5-CzH5S-1, 3, 4-T -COH5 (CH2) aNHCOCHa 5-CH3 DO. 14 5-oH3s-1, 3, 4-T oH. (CH2)3NHC0 OH(CH3)1 H Do. 15 5-CH3S-1,3,4T C.H5 -(CHz)3NHCOCHzOH H D0. 5-oH S-1,3.4-T CH. -(CH2)3NHCOCH2CH2C1 H D0. 17 5-CHaCHzCH3S-L3A-T -C0H3 -(CHa)aNHCO(5-CHCH-C b H D0.

18.. 5-CH CHzCH S-1, 3, MP C.H5 -(CHZ)3NHCOCBH5 H Do. 19. 5-CH CHgCH S-1,3,4-T O6H5 (CH2)3NHCOCH=CH2 H D0. 20. 5-CH;(CH)3S-1,3,4T -C@H5 (CHz);NHCOOH CH(CH3)z H Do. 21 5-CHa(CHz)3S-1,3,4T -COH5 CH2CHzCONHz H D0. 22".-.. 5-CqH CHzS-1, 3, 4-1 COH5 -OH;CHO0NH, H Do. 23 5-CaH5CH2S-1,3,4T -COHa (CH2)NHCOC:H5 H Do.

Example 91 The azo compound (50.0 mg.) of Example 4 is dispersed in 5 cc. of 2-methoxyethanol. A small amount (3-5 cc.) of a 3% sodium lignin sulfonate solution is added, with stirring, and then the volume of the bath is brought to 150 cc. with water. A 5.0 g. textile fabric made of nylon 66 fibers is placed in the bath which is then slowly brought to the boil. The dyeing is carried out at the boil for 1 hr. with occasional stirring. The dyeing is carried out at the" boil for 1 hr. with occasional stirring. The dyed fabric is then removed from the dyebath, rinsed with water, and dried in an oven at 250 F. The fabric is dyed a bright shade of orange exhibiting excellent fastness properties when tested in accordance with the procedures described in the Technical Manual of the American Association of Textile Chemists and Colorists (AATCC), 1968 edition.

Example 92 The 220 compound of Example 35 (0.1 g.) is dissolved in 10 cc. of 2-methoxyethanol. A small amount (35 cc.) of a 3% sodium lignin sulfonate aqueous solution is added, with stirring, and then the volume of the bath is brought to 300 cc. with Water. 3 cc. of an o-phenylphenol (Carolid) is added to the bath and 10 g. of a textile fabric made of poly(ethylene terephthalate) fibers is placed in the bath and worked 10 min. without heat. The dyeing is carried out at the boil for 1 hr. The dyed fabric is removed from the dyebath and scoured for 20 min. at

80 C. in a solution containing 1 g./l. neutral soup and 1 g./l. sodium carbonate. The fabric is then rinsed, dried in an oven at 250 F. and heat set (for removal of residual carrier) for min. at 350 C. The polyester fabric is dyed a bright orange shade which exhibits excellent fastness to light and resistance to sublimation when tested according to conventional AATCC procedures.

The compounds of the invention can also be applied to polyester textile materials by the heat fixation technique described in U.S. Pat. 2,663,612 and in the American Dyestuff Reporter, 42, 1 (1953).

As used herein, nylon textile and carpet materials means fibers, including yarns and fabrics prepared therefrom, having a basis of a synthetic linear polyamide such as nylon 66 (polyhexamethylene adipamide) manufactured by the polymerization of adipic acid and hexamethylenediamine, nylon 6 (polycaprolactam) prepared from, having a basis of a synthetic linear polyamide such and nylon 8. A detailed description of the synthetic polyamide materials which are dyed bright fast shades by the compounds of the invention is set forth in U.S. Pat.

3,100,134. Polymeric linear polyester materials of the tereph-thalate sold under the trademarks Kodel, Dacron and Terylene are illustrative of the linear aromatic polyester textile materials that can be dyed with the compounds of our invention. Examples of linear polyester textile materials that can be dyed with the compounds of the invention are those prepared from ethylene glycol and dimethylterephthalate or from cyclohexanedimethanol and dimethylterephthalate. Polyesters prepared from cyclohexanedimethanol and dimethylterephthalate are more particularly described in U.S. Pat. 2,901,446. Poly(ethylene terephthalate) polyester fibers are described, for example, in U.S. Pat. 2,465,319. The polymeric linear polyester materials disclosed in U.S. Pats. 2,945,010; 2,957,745 and 2,989,363, for example, can be dyed. The linear aroma-tic polyester materials specifically named have a melting point of at least 200 C. The poly(ethylene terephthalate) fibers which are dyed with the compounds of the invention are manufactured from a melt of a polymer having an inherent viscosity of at least 0.35 and preferably, about 0. 6. The inherent viscosity of the poly-(1,4-cyclohexylenedimethylene terephthalate) polymer is also at least 0.35. These inherent viscosities are measured at C. using 0.25 g. polymer per 100 ml. of a solvent consisting of 60% phenol and 40% tetrachloroethane. The polyester fabrics, yarns, fibers and filaments that are dyed with the novel azo compounds can also contain minor amount of other additives such as brighteners, pigments, delusterants, inhibitors, stabilizers, etc.

The invention has been described in detail with particular reference to preferred embodiments thereof, but it will be understood that variations and modifications can be effected within the spirit and scope of the invention.

We claim:

1. A compound having the formula wherein Z is hydrogen, halogen, lower alkylsulfonyl, R or R Y- in which R is lower alkyl; lower alkyl substituted with hydroxy, halogen, lower alkanoyloxy, lower alkoxycarbonyl, lower alkoxy, cyano, carbarnoyl, succinamido, cyclohexyl, lower alkylcyclohexyl or phenyl; cyclohexyl; lower alkylcyclohexyl; or phenyl; andYis S or O-;

R is aryl;

R is hydrogen, lower alkyl, cyanoethyl, lower alkylsulfonamidopropyl, arylsulfonamidopropyl,

in which n is 2 or 3;

R individually is hydrogen, lower alkyl, cyclohexyl,

aryl, hydroxymethyl, benzyl or 1,1-dimethyl-3- oxobutyl;

R individually is hydrogen or, when R is hydrogen or lower alkyl, R also can be lower alkyl;

R and R collectively are pentamethylene or ethyleneoxyethylene;

R is hydrogen; lower alkyl, lower alkyl substituted with hydroxy, lower alkoxy, lower alkylthio, lower alkanoyloxy, cyano, carbamoyl, aryl, halogen, aryloxy or lower alkylsulfonyl; cyclohexyl; lower alkylcyclohexyl; lower alkoxy; furyl, allyl; or aryl;

R is ethylene; trimethylene; 1,2-propylene; o-phenylene; or o-phenylene substituted with lower alkyl, lower alkoxy or halogen;

R is hydrogen, lower alkyl, lower alkoxy or halogen; and in which each aryl group is phenyl or phenyl substituted with lower alkyl, lower alkoxy or halogen. 2. A compound according to Claim 1 having the formula wherein Z is hydrogen, halogen, lower alkylsulfonyl, R or R -Y- in which R is lower alkyl; lower alkyl substituted with hydroxy, halogen, lower alkanoyloxy, lower alkoxycarbonyl, lower alkoxy, cyano, carbamoyl, succinamido, cyclohexyl, lower alkylcyclohexyl or phenyl; cyclohexyl; lower alkylcyclohexyl; or phenyl; and Y is -S- or -O; and R is hydrogen, lower alkyl, lower alkylsulfonamidopropyl,

in which R and R each is hydrogen or lower alkyl, or

CH CH CH NHCOR in which R is lower alkyl,

lower alkoxy, cyclohexyl, or phenyl.

3. A compound according to Claim 2 wherein Z is lower alkyl, lower alkylthio or lower alkoxy and R is hydrogen, lower alkyl, carbamoylethyl, lower alkanoylaminopropyl, lower alkoxycarbonylaminopropyl or lower alkylsulfonamidopropyl.

9 10 4. A compound according to Claim 1 having the 8. A compound according to Claim 1 having the formula formula NN o N-N Q (musga /-N=NIQI% r (rims-g N=Nfi|.

G O 9 9 S O .l/ \fi/ \l.| \g Q Q HiCHZCHzNHCOCHa O O e 10 o 9. A compound according to Claim 1 having the 5. A compound according to Claim 1 having the forformula mula N---N O I||IIfil C2H5S-\ /gN=N.--. o2H5s-Q /QN=N%-fi s I l S O O 9 O I N O COCH:

I II N Q CHzCHnCHnN CEHzCHzCONHz CO H:

O 10. A compound according to Claim 1 having the formula 6. A compound according to Claim 1 having the H H formula 02115 S .\S /.--:=N-|..ll.

1fiI-N /O \.W CH3 s N=N-Q. O H i I I! I momomNHsmoH,

O O 0 g Q a References Cited Q UNITED STATES PATENTS 3, 2,922,690 1/1960 Mueller et a1 260-158 X 3,136,751 6/1964 IIzuka et a1. 260-l58 foil-113a compound accordlng to Clalm 1 havlng the huchs .u. N N e FOREIGN PATENTS II [I 1,018,458 1/1966 Great Britain 260-458 -?-*fl I 3,810,737 6/1963 Japan 260-158 S C O Q FLOYD DALE HIGEL, Primary Examiner I ll H O O US. Cl. X.R.

"Pg 0 UNITE D STATES PATENT OFFICE, v CERTIFICATE OF CORRECTION 1 Patent No. $829,411 Dated ust 13 1974 vInv-elmds) Clarence A. Coates. Jr. and Max A; Weaver" It is certified that error appears in the above-identified patent and that said Letters Patent :are hereby corrected as shown below:

Col. 8 (Claim l)5 %ine 135 delete "(CH C0NR R and insert -(CH -CQNR R v Col. 8 (Claim 1) lines 20-23, afteg the formula delete -"in which" and insert therefor --and R is hydrogen, lower alkyl, lower alkoxy or halogen; in which-- v 1' (201. 8 (Claim 1) ,li ne 29, delete "R and insert therefor Col. 8 (Claim 1) delete line 42. C01. 9 (Claim 6) delete the formula therein and insert Signed and sealed this 29th day of October 1974.

(SEAL) Attest:

McCOY M; GIBSON JR; c. MARSHALL DANN Arresting, Officer Commissioner of Patents 

